Michael Berkeley 's guest today is the poet, novelist and biographer Elaine Feinstein , who is currently working on a biography of Ted Hughes. Her musical passions include a motet by Bach and a flute concerto by his son CPE Bach, a Chopin nocturne played by Artur Rubinstein , excerpts from operas by Mozart and Verdi, a song by Shostakovich and a Brecht ballad set by Eisler.